Plate-holder for printing-presses.



K. M. SOHLUETER & P. SGHLUETBR, JR. PLATE HOLDER FOR PRINTING PRESSES.

APPLICATION FILED JUNE 21, 1910.

Patented Apr. 18,1911.

A TTORNEYJI FIQ.

KARL M. SCI-ILUETER AND FERDINAND SCHLUETER, JR, NEW YORK, N. Y.

Specification of Letters Patent.

Patented Apr. 18, 1911.

Application filed June 21, 1910. Serial No. 568,234.

' T 0 all whom it may concern:

Be it known that we, KARL M. SOI-ILUETER and FERDINAND SOHLUETER, J12,citizens of the United States, and residents of New York city, county ofNew, York, and State of New York, have invented certain new and usefulImprovements in Plate-Holders for Printing'Presses, of which thefollowing is a specification, reference being had to the accompanyingdrawing, forming a part thereof, in which similar letters of referenceindicate corresponding parts.

.device of this character which obviates liability of accidentalloosening, and which is susceptible of successive engagement with thefour edges of a printing-plate, the same comprising expansible membersmovable by means of a horizontal screw and nut located below the surfaceof the base and a triangular clamping-plate having clamping edgesextended at right angles to each other whereby the operations ofattaching and using the device are facilitated; further the clampingaction is direct and the operating nut is not susceptible of accidentalloosening, thus providing a device which, when fixed to the base,remains rigidly in place.

The invention will be hereinafter fully de scribed and specifically setforth in the annexed claims.

In the accompanying drawings forming part of this specification, Figure1, is a plan view of part of a printing press base having two of myimproved plate holders attached thereto; Fig. 2, a cross sectionalelevation taken on the line 2-2, of Fig. 1; and Fig. 3, is a side viewof the device.

As illustrated by the drawings, we employ for directly holding theprinting plate a metallic clamping-plate a, which is triangular incontour and has two beveled-edges b and 0, extended at right angles fromeach other, these are for successive engagement with any of the fourbeveled-edges of printing plates. Said clamping-plate 0, forms part of alaterally extended and downwardly directed member at, having a sidecontour adapted for snugly registering with one of the side walls of agroove, as e, formed in the base 7. In the drawings we have shown a basehaving dove-tailed grooves, but our device is susceptible of successfuloperation in connection with bases having other shaped grooves, asgrooves having vertical side walls and grooves having compound-curvedside walls. In such cases it is simply necessary to provide the memberd, and the plate 9, hereinafter described, with outer surfaces of acontour adapted to register with the side walls of the groove employed.

Extended parallel with the member (Z, is a plate 9, having a horizontalscrew it, formed integral therewith. On this screw is threaded a nut i,which is formed integral with a sleeve j, which is in pivotal engagementwith the member (Z, said member cl having a recess 1, flush with thecounter-sunk head 2, of the sleeve whereby said head does not contactwith the side walls of the grooves of the base when the device isattached. The said plate g, having a side surface formation adapted toregister with the side wall of the groove employed, whereby the devicemay be securely clamped and held within said groove. The part 3, of themember 0?, is provided with a tongue 4, which engages a groove 5, of theplate g, wherebysaid plate is maintained in alinement and prevented fromturning on the screw it, while the device is being operated.

In theoperation and use of the invention, by turning the nut i, in onedirection the screw it, and its clamping plate g, will move away fromthe member (Z, thus expanding the device and securely clamping themember (Z and plate g, within the groove 6, of the base f. To remove ita few turns of the nut in an opposite direction is all that isnecessary. The direct and positive horizontal movement of the clampingparts admits of so securely fastening the device within a groove of thebase that accidental displacement thereof is obviated. while at the sametime it is susceptible of rapid operation both as regards attachment andremoval.

While we have illustrated the device in connection with a flat base, itis also susceptible of use, in slightly modified form, in connectionwith a. grooved cylindrical base.

Having thus described our invention, what we claim as new, and desire tosecure by Letters Patent, is

1. A printing plate holder comprising a beveled-edged plate having anintegrally formed depending and laterally extended member adapted forengagement within a groove of a printing press base, and a parallelclamping-member having a horizontal screw, and a. nut pivotally engagingfirst named member and threaded on said screw, said beveled-edged plateadapted for bridging a groove of a printing press base, substantially asshown and described.

2. A printing plate holder comprising a beveled-edged clamping-plate forengaging the printing plate, said clamping-plate adapted to bridge agroove of and be held on parts of the surface of a printing press baselocated on opposite sides of said groove, said clamping-plate having adepending, integrally formed and laterally-ex tended member, and aparallel clampingmember having a horizontal screw, and a nut engagingsaid screw and in pivotal engagement with the first named member, theholder adapted to be expanded and clamped within a groove of a printingpress base by direct horizontal movement of said screw and itsclamping-member, substantially as shown and described.

3. The combination, with a printing-plate holder comprising aclamping-plate having an integrally formed, depending and laterallyextended member, a nut in pivot-a1 engagement with said member, and ahorizontally movable screw threaded through said nut and having aclamping-member on the free end thereof which is parallel with the firstnamed member; of a base having parallel grooves, the holder clampedwithin one of said grooves, and the clamping-plate bridging said grooveand bearing 011 the surface of said base 011 opposite sides of saidgroove, substantially as shown and described.

In testimony that, we claim the foregoing as our invention, we havesigned our names in the presence of two witnesses, this seventh day ofJune, 1910.

KARL M. SCHLUETER. FERDINAND SGHLUETER, J12.

\Vitnesses M. B. Dow, THos. C. BENNETT.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, I). C.

